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  <ul id='cal'>
    <li class="size4 input">
      123450
    </li>
    <li class="size1 key func">C</li>
    <li class="size1 key func">±</li>
    <li class="size1 key func">％</li>
    <li class="size1 key operator">÷</li>
    <li class="size1 key num">7</li>
    <li class="size1 key num">8</li>
    <li class="size1 key num">9</li>
    <li class="size1 key operator">×</li>
    <li class="size1 key num">4</li>
    <li class="size1 key num">5</li>
    <li class="size1 key num">6</li>
    <li class="size1 key operator">-</li>
    <li class="size1 key num">3</li>
    <li class="size1 key num">2</li>
    <li class="size1 key num">1</li>
    <li class="size1 key operator">+</li>
    <li class="size2 key num">0</li>
    <li class="size1 key num">.</li>
    <li class="size1 key operator">=</li>

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